Wrench.



H. E. E. MOLKENTHIN. WRENCH.

APPLICATION FILED MAR.21,1S)14.

1 ,1 14,377, Patented Oct. 20, 1914.

a vilwcooeo panics:-

ii sfici iieatio nvof LetterisjPatent. 'Pat entgd,0cfi; 4-,

Application film-Manna; 1914; Serial 110. 826 .330.

To all whom it may concern I Be it known that I, HERMAN 'E. E.Monnex'rnrx, a citizen of the United States, residing at Coeur dAlene,in the county of Kootcnai and State of Idaho, have invented certain newand useful Improvements in renches, of which the following is aspecification.

This invention relates to an improved wrench, and the prin ipal objectof the invention is to provide improved means for operating the jaws sothat by pivotally mounting the handle, the removable jaw may be broughtinto and out of engagement with the stationary jaw.

Another object of the invention is to so connect the link of the movablejaw with the handle and movable jaw that the link will at all times movesubstantially parallel to the shank of the stationary jaw, and thus beprevented from danger of bending.

Another object of the invention is to so construct the handle that thelink will engage abutment shoulders formed upon the handle and thuslimit the opening of the wrench.

This invention is illustrated in the accompanying drawings wherein-Figure 1 is a perspective view of the improved wrench; Fig. 2 is afragmentary view showing the wrench in an open position, certainportions of the jaws being broken away to show the manner of removablymounting the gripping plates.

The handle 10 of this wrench is provided with a head 11 which isprovided with a slot 12 in which the inner end of the shank 13 ispivotally mounted by means of the pin 14. A hinge car 15 extends fromthe head 11, the side face of the head from which the hinge ear extendsbeing cut at an incline so that abutment shoulders will be formed uponopposite Sides of the hinge car to limit the pivotal movement of thelink-16 which is pivotally connected with the car 15 by means of the pin17. The movable jaw 18 is slidably mounted upon the shank of thestationary jaw 19 and is provided with a reduced lower forward port-ionforming a hinge car 20 with which the link 16 is pivotally connected bymeans of the pin 21. The jaws 18 and 19 are provided with under cutgrooves in which the dovetail gripping plates 22 are placed andrelcasably held by means of grooves 23.

-lVhen using this wrench, the jaw 19 is grasped with one hand andthe-handle n, with the other. The handle is-tiu'ncd upon its pivot pin14 to draw the movable jaw tothe open position shown in Fig. \Yhen I,

the handle 10 has been turned to draw the jaw 18 along the shank 13 asfar as possible, the link 16 will engage the shoulders of the head 11and thus prevent the jaw 18 from being drawn along the shank 13 anyfarther. The wrench is placed upon the pipe or nut with the pipe or nutfitting between the gripping plates 22 and the handle is then moved inthe opposite direction to bring the movable jaw toward the stationaryjaw. The two jaws will engage the pipe or nut and the teeth of thegripping plates will bite into the pipe thus preventing the wrench fromturning upon the pipe.

After the pipe has been tightly gripped, the stationary jaw can bereleased and pressure then placed upon the handle so that the pipe canbe turned. The link 16 is at all times positioned substantially parallelto the shank 13 and therefore the strain extends longitudinally of theshank and link thus preventing the shank and link from being broken ortwisted. After the pipe has been turned as far as possible with oneoperation,

the pressure can be released from the handle 18 and the wrench can thenbe turned upon the pipe without it being necessary to move the wrenchfrom the pipe. The wrench can therefore be operated without being movedfrom the pipe since it can be oscillated upon the same with the jawsslipping upon the pipe when moving in one direction and gripping thepipe when moving in the opposite direction. It should also be noted thatthe wrench can be quickly applied and removed from the pipe since thejaws do not have to be adjusted by a worm screw or other means.

What is claimed is:

1. A wrench comprising a handle, a head at one end of said handleprovided with a longitudinally extending slot and having one face at anincline to form abutment shoulders, a hinge ear extending from theinclined face of said head, a movable jaw having its shank pivotallymounted in the slot of said head, a movable jaw slidably mounted uponthe shank of said stationary jaw and having its lower forward port onreduced to form a hinge ear, and a link pivotally connected with thehinge car of said movable jaw and with the hinge ear of inclined face ofsaid handle, a stationary said head, the link being positioned at allwith the hinge ear of said handle whereby times substantially parallelto the shank of said stationary jaw.

3 2. A wrench comprising-la handle provided at one end with a headhaving one face cut at an incline to form abutment shoulders, a hingeear extending from the stantially parallel to the shank. of saidstationary jaw and engage the inclined face of said handle to limit thepivotal movement of said link in one direction.

In testimony whereof I afiix niy signature 2 h h k l in presence of twowitnesses. jaw aving its 5 an ivotal connected with said handle,-amgvable jiiw slidably HERMAN MOLKENTHIN' mounted upon the shank'of saidstationary Witnesses: jaw and the link 'pivotally connected withROBERT,H. .MUNGEY, said movable jaw and pivotally connected W. H.HOLDEN.

Said link will at all times be positioned sub- 15. I

